:root {
  --bg: #F8FAFC;
  --bg-elevated: #FFFFFF;
  --bg-elevated-2: #F1F5F9;
  --border: #E2E8F0;
  --border-soft: #F1F5F9;
  --text: #0F172A;
  --text-muted: #475569;
  --text-faint: #64748B;
  --accent: #2563EB;
  --accent-strong: #1D4ED8;
  --accent-soft: rgba(37, 99, 235, 0.08);
  --accent-2: #0284C7;
  --accent-2-soft: rgba(2, 132, 199, 0.08);
  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;
  --container-width: 1120px;
  --radius-s: 6px;
  --radius-m: 12px;
  --radius-l: 16px;
  --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --header-bg: rgba(248, 250, 252, 0.82);
  --header-bg-scrolled: rgba(248, 250, 252, 0.96);
}
:root.dark {
  --bg: #0F172A;
  --bg-elevated: #1E293B;
  --bg-elevated-2: #334155;
  --border: #334155;
  --border-soft: #1E293B;
  --text: #F1F5F9;
  --text-muted: #94A3B8;
  --text-faint: #64748B;
  --accent: #60A5FA;
  --accent-strong: #3B82F6;
  --accent-soft: rgba(96, 165, 250, 0.12);
  --accent-2: #38BDF8;
  --accent-2-soft: rgba(56, 189, 248, 0.12);
  --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --header-bg: rgba(15, 23, 42, 0.82);
  --header-bg-scrolled: rgba(15, 23, 42, 0.96);
}

@media (prefers-color-scheme: dark) {
  :root:not(.light) {
    --bg: #0F172A;
    --bg-elevated: #1E293B;
    --bg-elevated-2: #334155;
    --border: #334155;
    --border-soft: #1E293B;
    --text: #F1F5F9;
    --text-muted: #94A3B8;
    --text-faint: #64748B;
    --accent: #60A5FA;
    --accent-strong: #3B82F6;
    --accent-soft: rgba(96, 165, 250, 0.12);
    --accent-2: #38BDF8;
    --accent-2-soft: rgba(56, 189, 248, 0.12);
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --header-bg: rgba(15, 23, 42, 0.82);
    --header-bg-scrolled: rgba(15, 23, 42, 0.96);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body), sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}

p {
  margin: 0;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 56px);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #FFFFFF;
  padding: 8px 14px;
  border-radius: var(--radius-s);
  z-index: 200;
}

.skip-link:focus {
  left: 12px;
  top: 12px;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.site-header.is-scrolled {
  background: var(--header-bg-scrolled);
  border-color: var(--border);
}

.header-top {
  max-width: var(--container-width);
  margin-inline: auto;
  padding: 14px clamp(20px, 5vw, 56px) 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-soft);
  color: var(--accent-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.icon-link {
  color: var(--text-muted);
  display: flex;
  transition: color 0.15s ease;
}

.icon-link:hover {
  color: var(--text);
}

button.theme-toggle {
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  outline: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.875rem;
  padding: 9px 16px;
  border-radius: var(--radius-s);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #FFFFFF;
}

.btn-primary:hover {
  background: var(--accent-strong);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.btn-ghost {
  background: var(--bg-elevated);
  color: var(--text-muted);
  border-color: var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--text-faint);
}

.pipeline {
  max-width: var(--container-width);
  margin-inline: auto;
  padding: 4px clamp(20px, 5vw, 56px) 14px;
}

.pipeline-track {
  position: relative;
  height: 2px;
  background: var(--border);
  border-radius: 2px;
  margin: 0 8px 10px;
}

.pipeline-fill {
  position: absolute;
  inset: 0;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 2px;
  transition: width 0.15s linear;
}

.pipeline-list {
  display: flex;
  justify-content: space-between;
  position: relative;
}

.pipeline-stage {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 2px 4px;
  font-family: var(--font-mono);
}

.pipeline-node {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  color: transparent;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.pipeline-stage.is-active .pipeline-node {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.pipeline-stage.is-passed .pipeline-node {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
}

.pipeline-label {
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-faint);
  transition: color 0.2s ease;
}

.pipeline-stage.is-active .pipeline-label {
  color: var(--accent-strong);
}

.pipeline-stage.is-passed .pipeline-label {
  color: var(--text-muted);
  :root.dark .pipeline-list,
  :root:not(.light) .pipeline-list {
    color: var(--text-muted);
  }

  :root.dark .pipeline-label,
  :root:not(.light) .pipeline-label {
    color: var(--text-muted);
  }

  :root.dark .pipeline-stage.is-passed .pipeline-label,
  :root:not(.light) .pipeline-stage.is-passed .pipeline-label {
    color: var(--text);
  }
}

.pipeline-current {
  display: none;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent-strong);
  margin-top: 6px;
}

.hero {
  padding: clamp(56px, 9vw, 96px) 0 clamp(48px, 7vw, 80px);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -200px;
  right: -160px;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, var(--accent-soft), transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
  position: relative;
  max-width: 800px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--accent-strong);
  margin-bottom: 18px;
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

.dot-live {
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-soft); }
  50% { box-shadow: 0 0 0 6px var(--accent-soft); }
}

.hero h1 {
  font-size: clamp(2.1rem, 1.5rem + 2.6vw, 3.4rem);
  line-height: 1.12;
  margin-bottom: 20px;
  color: var(--text);
}

.hero-lead {
  color: var(--text-muted);
  font-size: clamp(1rem, 0.95rem + 0.2vw, 1.15rem);
  max-width: 54ch;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.section {
  padding: clamp(56px, 8vw, 88px) 0;
  border-top: 1px solid var(--border-soft);
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent-strong);
  margin-bottom: 14px;
}

.section h2 {
  font-size: clamp(1.5rem, 1.2rem + 1vw, 2.1rem);
  margin-bottom: 14px;
}

.section-lead {
  color: var(--text-muted);
  max-width: 56ch;
  margin-bottom: 36px;
}

.summary-grid {
  display: grid;
  grid-template-columns: 1.6fr 0.9fr;
  gap: 40px;
  align-items: start;
}

.summary-text {
  font-size: 1.08rem;
  color: var(--text);
  max-width: 62ch;
}

.fact-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  border-left: 1px solid var(--border);
  padding-left: 24px;
}

.fact-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 4px;
}

.fact-value {
  display: block;
  font-size: 1rem;
  color: var(--text);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px 32px;
}

.skill-group-wide {
  grid-column: span 3;
}

.skill-group h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text);
}

.chip-outline {
  background: transparent;
  border: 1px dashed var(--text-faint);
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.chip-outline sup {
  font-family: var(--font-body);
  font-size: 0.62rem;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.chip-muted {
  background: transparent;
  border: 1px solid var(--border-soft);
  color: var(--text-muted);
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 20px;
}

.timeline-marker {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 6px;
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.timeline-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.timeline-content h3 {
  font-size: 1.15rem;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-faint);
  white-space: nowrap;
}

.timeline-org {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin: 6px 0 14px;
}

.timeline-note {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-top: 6px;
}

.bullet-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.bullet-list li {
  position: relative;
  padding-left: 18px;
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.55;
}

.bullet-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-2);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.project-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: var(--shadow-card);
}

.project-card-feature {
  grid-column: span 2;
  background: linear-gradient(160deg, var(--bg-elevated), var(--bg-elevated-2));
  border-color: var(--border);
}

.project-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.project-card h3 {
  font-size: 1.05rem;
}

.project-stack {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-faint);
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--accent-2);
  margin-top: auto;
  padding-top: 6px;
}

.project-link:hover {
  color: var(--accent-strong);
}

.progress-list {
  display: flex;
  flex-direction: column;
}

.progress-item {
  display: grid;
  grid-template-columns: 16px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--border-soft);
}

.progress-item:first-child {
  border-top: none;
}

.progress-node {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--accent-2);
  margin-top: 6px;
  position: relative;
}

.progress-node::after {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1px solid var(--accent-2-soft);
}

.progress-body h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.progress-body p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.section-contact {
  padding-bottom: clamp(72px, 10vw, 110px);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.contact-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  color: var(--accent-2);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: var(--shadow-card);
}

.contact-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 12px -2px rgba(0, 0, 0, 0.05), 0 3px 6px -2px rgba(0, 0, 0, 0.03);
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.contact-value {
  font-size: 0.92rem;
  color: var(--text);
  word-break: break-word;
}

.site-footer {
  border-top: 1px solid var(--border-soft);
  padding: 28px 0 40px;
}

.footer-grid {
  display: flex;
  justify-content: Center;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--text-faint);
  font-size: 0.85rem;
}

[data-animate] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  [data-animate] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .dot-live {
    animation: none;
  }
}

@media (max-width: 980px) {
  .summary-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .fact-list {
    border-left: none;
    padding-left: 0;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 24px;
  }
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .skill-group-wide {
    grid-column: span 2;
  }
  .project-grid {
    grid-template-columns: 1fr;
  }
  .project-card-feature {
    grid-column: span 1;
  }
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .pipeline-label {
    display: none;
  }
  .pipeline-current {
    display: block;
  }
  .pipeline-list {
    padding: 0 4px;
  }
  .skills-grid {
    grid-template-columns: 1fr;
  }
  .skill-group-wide {
    grid-column: span 1;
  }
  .timeline-item {
    grid-template-columns: 14px 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 460px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .header-top {
    padding-top: 12px;
  }
  .brand-name {
    font-size: 0.85rem;
  }
}

.theme-transition,
.theme-transition *,
.theme-transition *::before,
.theme-transition *::after {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, fill 0.3s ease, stroke 0.3s ease, box-shadow 0.3s ease !important;
}